code: def close(self):
      with open(osp.join(self.path, "train.meta"), "wb") as pfile:
          pickle.dump(
              self.meta, pfile, protocol=pickle.HIGHEST_PROTOCOL
          )
      print("stat:", self.widx, self.wlabel)
      with open(os.path.join(self.path, "property"), "w") as f:
          f.write(
              "%d,%d,%d\n"
              % (
                  self.max_label + 1,
                  self.image_size[0],
                  self.image_size[1],
              )
          )
          f.write("%d\n" % (self.widx))
  
file_path: insightface/python-package/insightface/data/rec_builder.py
imports: import pickle
  import numpy
  import os
  import os.path
  import sys
  import mxnet
label_desc: Use image node_id 4 for calling the RecBuilder obj's underlying member method code with example usage: obj.close() without return types